W83977A Winbond Electronics Corp America, W83977A Datasheet - Page 18
W83977A
Manufacturer Part Number
W83977A
Description
Winbond I/O
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83977A.pdf
(160 pages)
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1.5 Multi-Mode Parallel Port, continued
BUSY
ERR
ACK
SYMBOL
PIN
21
22
34
OD
OD
OD
OD
OD
OD
I/O
IN
IN
IN
t
12
12
t
12
12
t
12
12
PRINTER MODE: BUSY
An active high input indicates that the printer is not ready to receive
data. This pin is pulled high internally. Refer to description of the
parallel port for definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: MOB2
This pin is for Extension FDD B; the function of this pin is the same
as the MOB pin of FDC.
EXTENSION 2FDD MODE: MOB2
This pin is for Extension FDD A and B; the function of this pin is the
same as the MOB pin of FDC.
PRINTER MODE: ACK
An active low input on this pin indicates that the printer has
received data and is ready to accept more data. This pin is pulled
high internally. Refer to description of the parallel port for
definition of this pin in ECP and EPP mode.
EXTENSION FDD MODE: DSB2
This pin is for the Extension FDD B; its functions is the same as the
DSB pin of FDC.
EXTENSION 2FDD MODE: DSB2
This pin is for Extension FDD A and B; it functions is the same as
the DSB pin of FDC.
PRINTER MODE: ERR
An active low input on this pin indicates that the printer has
encountered an error condition. This pin is pulled high internally.
Refer to description of the parallel port for definition of this pin in
ECP and EPP mode.
EXTENSION FDD MODE: HEAD2
This pin is for Extension FDD B; its function is the same as the
HEADpin of FDC.
EXTENSION 2FDD MODE: HEAD2
This pin is for Extension FDD A and B; its function is the same as
the HEAD pin of FDC.
-10-
FUNCTION
Publication Release Date: April 1998
W83977TF
PRELIMINARY
Revision 0.62
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